#include <stdio.h>
double max(double a, double b); 

int main()
{
	double  x, y;
	scanf_s("%lf%lf", &x, &y);
	printf("%.8lf\n", max(x, y));
	return 0;
}
double max(double  a, double  b)
{
	return (a > b ? a : b);
}